Describe a situation that could be modeled with the ratio 4: 1

Each student in Mrs. Azulai's 4th period math class takes his collection of
$1 bills to his nearest neighborhood branch bank, and exchanges the bills
for 25¢ pieces.  During their excited discussion of their experiences in the
next day's class, the students are astonished to learn that no matter how few
or how many $1 bills any of them had, the ratio of the number of $1 bills to the
number of 25¢ pieces was precisely the same for each and every student.
Calculate that ratio .

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!